I think you should complain —______,of course, you are happy with the way things are.
| A．if | B．unless | C．as | D．because |
Many tall buildings _______ in Shengsi in the past few years.
| A．has been built | B．have been built | C．were built | D．have built |
It was in the primary school ______ he studied ______ he knew how to be an honest person.
| A．where, that | B．where, which | C．that, which | D．which, that |
He insisted that the book _______ to the school library at once.
| A．return | B．should return | C．be returned | D．would be returned |
We were running out of gas. I went off ____ a service station where I could buy some gas.
| A．in danger of | B．in need of | C．in search of | D．in return for |
Jane, I have been told that you to America．Have you got everything right?
| A．have traveled | B．travel | C．would travel | D．are traveling |